Electrospun CuAl2O4 hollow nanofibers as visible light photocatalyst with enhanced activity and excellent stability under acid and alkali conditions

摘要: Photocatalysts with desirable and stable photocatalytic activity under visible light irradiation are of great significance for water purification. In this work, we prepared CuAl2O4 hollow nanofibers (HNFs) diameters 100–150 nm by combining electrospinning technique subsequent annealing. The structure could be obtained at appropriate heating rate (3–5 °C min−1), probably because the existence an oxygen concentration gradient resulted in faster decomposition polymer on surface than interior nanofibers. HNFs had large specific area reactions narrow band gap good absorption. As expected, exhibited degrading both rhodamine B methyl orange calcination temperature strongly affected performance. Importantly, was very pH 3–11 due to excellent chemical stability. Moreover, mechanism investigated based trapping experiments it found that e−, h+ ˙O2− were vital species reactions. Most all, easily recycled sedimentation separation their non-woven web mechanical Therefore, as-prepared as a promising photocatalyst may have prospects sustainable development engineering applications.